Geochemistry of Brines in the Tunguska and Olenek Artesian Basins (Siberian Platform)

A comparative analysis of the chemical composition of underground brines in sections of the Tunguska and Olenek artesian basins is accomplished. The paper examines the equilibrium degree of brines with host rock minerals: carbonate (dolomite, calcite, magnesite, strontianite), sulfate (gypsum and celestine), chloride (halite, sylvite) and some aluminosilicates (anorthite, albite, illite, montmorillonites, kaolinite, muscovite, and others). Origin of brines is discussed based on results of the calculation of genetic coefficients. The paper presents a schematic generalization of data on the chemical composition, mineral concentration, genesis, and abundance of brines in the studied subjects.